Imagine what it’s like trying to have a difficult conversation with 7 billion people to let them know that our biosphere is on the verge of collapse. That is precisely what the Nature Needs Half Network is doing.

Something alienates us from more meaningful days, even as it clamps down on our delight in life and gratitude for the wonder of nature. Can you guess what it is? Everywhere you go, it’s there, hidden in plain view. It’s carried on airwaves and spilling over the pages of magazines and newspapers.

Lions, tigers, and pangolins, those dream-like creatures that hardly seem real and are daily becoming less so as they find themselves trafficked into extinction. The Amazon, India, and seventy dozen other landscapes that make possible a fitful coexistence between...